Helllo ! I have just performed a new oracle 11g installation on a Windows pc. However I get error ORA-12514 when attempting to connect to the database using sql plus or even when doing a connection test with oracle net manager.

when I run the command lsnrctl services I just get the below.....
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC1521)))
Services Summary...
Service "CLRExtProc" has 1 instance(s).
Instance "CLRExtProc", status UNKNOWN, has 1 handler(s) for this service...
Handler(s):
"DEDICATED" established:0 refused:0
LOCAL SERVER
The command completed successfully

......which probably tells me (I'm assuming) that my database is not registered with the listener.

Can someone please help ? I'm not very familiar with oracle connection issues. Thanks !

# This file is actually generated by netca. But if customers choose to
# install "Software Only", this file wont exist and without the native
# authentication, they will not be able to connect to the database on NT.

just wanted to mention also that I have a loopback adapter enabled. While doing the oracle install I ensured that all other network connections (wired and wireless) were disabled except for the loopback adapter. The loopbck adaptor has a static IP 192.168.2.5 which is present in my hosts file